<?php

class HomeworkController extends Controller
{
	/**
	 * @var string the default layout for the views. Defaults to '//layouts/column2', meaning
	 * using two-column layout. See 'protected/views/layouts/column2.php'.
	 */
	public $layout='/layouts/triple_sidebar';

	/**
	 * @return array action filters
	 */
	public function filters()
	{
		return array(
			'accessControl', // perform access control for CRUD operations
			'postOnly + delete', // we only allow deletion via POST request
		);
	}

	/**
	 * Specifies the access control rules.
	 * This method is used by the 'accessControl' filter.
	 * @return array access control rules
	 */
	public function accessRules()
	{
		return array(
			array('allow',  // allow all users to perform 'index' and 'view' actions
				'actions'=>array('index','view'),
				'users'=>array('*'),
			),
			array('allow', // allow authenticated user to perform 'create' and 'update' actions
				'actions'=>array('create','update','deletefiles'),
				'users'=>array('@'),
			),
			array('allow', // allow admin user to perform 'admin' and 'delete' actions
				'actions'=>array('admin','delete'),
				'roles'=>array('student'),
				'users'=>array('*'),
			),
			array('deny',  // deny all users
				'users'=>array('*'),
			),
		);
	}

	/**
	 * Displays a particular model.
	 * @param integer $id the ID of the model to be displayed
	 */
	public function actionView($id)
	{
		$this->render('view',array(
			'model'=>$this->loadModel($id),
		));
	}

	/**
	 * Creates a new model.
	 * If creation is successful, the browser will be redirected to the 'view' page.
	 */
	public function actionCreate()
	{
		$model=new Homework;
		$homework_location = new Files;
		$hw_lctn_assignment = new FileHwAssignment;
		
		$temp_date = '';
		// Uncomment the following line if AJAX validation is needed
		// $this->performAjaxValidation($model);

		if(isset($_POST['Homework']))
		{
			$model->attributes=$_POST['Homework'];
			$model->DateCreated = date_create()->format('Y-m-d H:i:s');
			$model->SubmittedDate = $model->DateCreated;
			$temp_date = $model->DateCreated;
			$model->AcceptedDate = null;
			$model->users_id = Yii::app()->user->getId();
			$model->homework_status_status_id = 3;
			$file = CUploadedFile::getInstance($model, 'document1');
			$file_name = "";
			if($file !== null){
				$file_name = "{$file}";
				}
			$location = Yii::app()->basePath . '/modules/teacher/files/homeworks/' . $file_name;
			if($file->saveAs($location)){
					$homework_location->location = $location;
					$homework_location->save();
					$model->save();
					$hw_lctn_assignment->homework_id = Homework::model()->findByAttributes(array('DateCreated'=>$temp_date))->id;
					$hw_lctn_assignment->file_id = Files::model()->findByAttributes(array('location'=>$location))->id;
					if($hw_lctn_assignment->save()){
						$this->redirect(array('view','id'=>$model->id));
					}
				}
		}

		$this->render('create',array(
			'model'=>$model,
		));
	}

	/**
	 * Updates a particular model.
	 * If update is successful, the browser will be redirected to the 'view' page.
	 * @param integer $id the ID of the model to be updated
	 */
	public function actionUpdate($id)
	{
		$homework_location = new Files;
		$hw_lctn_assignment = new FileHwAssignment;
		$model=$this->loadModel($id);
		$model1 = ''; $model2 = ''; $boolean_check = true;
		$model3 = FileHwAssignment::model()->findByAttributes(array('homework_id'=>$id));
		if($model3 !== null){
				$model1 = $model3->file_id;
				$model2 = Files::model()->findByPk($model1)->location;
				$boolean_check = true;
			}
		else{
				$boolean_check = false;
			}
		// Uncomment the following line if AJAX validation is needed
		// $this->performAjaxValidation($model);

		if(isset($_POST['Homework']))
		{
			$model->attributes=$_POST['Homework'];
			if(!$boolean_check){
				$file = CUploadedFile::getInstance($model, 'document1');
				$file_name = "{$file}";
				$location = Yii::app()->basePath . '/modules/teacher/files/homeworks/' . $file_name;
				if($file->saveAs($location)){
					$homework_location->location = $location;
					$homework_location->save();
					$model->SubmittedDate = date_create()->format('Y-m-d H:i:s');
					$tempDate = $model->SubmittedDate;
					$model->save();
					$hw_lctn_assignment->homework_id = Homework::model()->findByAttributes(array('SubmittedDate'=>$tempDate))->id;
					$hw_lctn_assignment->file_id = Files::model()->findByAttributes(array('location'=>$location))->id;
					if($hw_lctn_assignment->save()){
						$this->redirect(array('view','id'=>$model->id));
					}
					}
				}
			
		}

		$this->render('update',array(
			'model'=>$model,
			'model1'=>$model1,
			'model2'=>$model2,
			'hasFile'=>$boolean_check,
		));
	}

	/**
	 * Deletes a particular model.
	 * If deletion is successful, the browser will be redirected to the 'admin' page.
	 * @param integer $id the ID of the model to be deleted
	 */
	public function actionDelete($id)
	{
		$file_id = FileHwAssignment::model()->findByAttributes(array('homework_id'=>$id));
		if($file_id !== null){
			$location = Files::model()->findByPk($file_id->file_id)->location;
			Files::model()->deleteByPk($file_id->file_id);
			FileHwAssignment::model()->deleteAllByAttributes(array('file_id'=>$file_id->file_id));
			unlink($location);
			}
		$this->loadModel($id)->delete();

		// if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
		if(!isset($_GET['ajax']))
			$this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));
	}

	/**
	 * Lists all models.
	 */
	public function actionIndex()
	{
		$dataProvider=new CActiveDataProvider('Homework', array(
			'criteria'=>array(
				'order'=>'SubmittedDate DESC',
			),
		));
		$this->render('index',array(
			'dataProvider'=>$dataProvider,
		));
	}

	/**
	 * Manages all models.
	 */
	public function actionAdmin()
	{
		$model=new Homework('search');
		$model->unsetAttributes();  // clear any default values
		if(isset($_GET['Homework']))
			$model->attributes=$_GET['Homework'];

		$this->render('admin',array(
			'model'=>$model,
		));
	}

	/**
	 * Returns the data model based on the primary key given in the GET variable.
	 * If the data model is not found, an HTTP exception will be raised.
	 * @param integer $id the ID of the model to be loaded
	 * @return Homework the loaded model
	 * @throws CHttpException
	 */
	public function loadModel($id)
	{
		$model=Homework::model()->findByPk($id);
		if($model===null)
			throw new CHttpException(404,'The requested page does not exist.');
		return $model;
	}

	/**
	 * Performs the AJAX validation.
	 * @param Homework $model the model to be validated
	 */
	protected function performAjaxValidation($model)
	{
		if(isset($_POST['ajax']) && $_POST['ajax']==='homework-form')
		{
			echo CActiveForm::validate($model);
			Yii::app()->end();
		}
	}
	
	public function actionDeleteFiles($file_id, $id){
			$location = Files::model()->findByPk($file_id)->location;
			Files::model()->deleteByPk($file_id);
			FileHwAssignment::model()->deleteAllByAttributes(array('file_id'=>$file_id));
			unlink($location);
			$this->redirect(array('update', 'id'=>$id));
		}
}
